refrain from spinning on locks when there is already a waiter

[android-x86/external-musl-libc.git] / src / thread / __wait.c

diff --git a/src/thread/__wait.c b/src/thread/__wait.c
index c1d6b61..01ee598 100644 (file)
--- a/src/thread/__wait.c
+++ b/src/thread/__wait.c
@@ -4,7 +4,7 @@ void __wait(volatile int *addr, volatile int *waiters, int val, int priv)
 {
        int spins=100;
        if (priv) priv = 128;
-       while (spins--) {
+       while (spins-- && (!waiters || !*waiters)) {
                if (*addr==val) a_spin();
                else return;
        }